Changing out the power supply will solve both of those problems. Be cautious, however, as that model PC is a very small case and the sizes will be a concern. Due research to verify that whatever is purchased will fit. I also noticed that there is no normal 20/24 pin connection to the motherboard, which means this is a proprietary power supply, IE: not normal /common.

According to @Grzwacz , he has found a power supply that may work for you. See in this thread: